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Oxothiazolidine

What Oxothiazolidine is & what it does

Oxothiazolidine, also written as 2-oxothiazolidine-4-carboxylic acid, is a sulfur-containing organic compound used as a cosmetic ingredient. In skincare formulas it is commonly included as a conditioning or antioxidant-support agent, since it is related to cysteine metabolism. It is typically used at low concentrations in serums and moisturizers.

What does Oxothiazolidine do in skincare?

Oxothiazolidine is commonly used in skincare as a conditioning ingredient and is related to cysteine, an amino acid involved in antioxidant pathways. It is typically added at low levels to serums and moisturizers. Its role is generally supportive rather than the main active in a formula.

Is Oxothiazolidine safe in cosmetics?

Oxothiazolidine is used in cosmetics at low concentrations and is generally regarded as well tolerated in that context. As with any ingredient, sensitivity can vary between individuals. A patch test is a reasonable step if you have reactive skin.

Is Oxothiazolidine natural or synthetic?

Oxothiazolidine is typically produced synthetically for cosmetic use, though it is chemically related to compounds found in normal cellular metabolism. The version used in skincare is made to a defined cosmetic grade. This helps ensure consistent purity and performance.

Sunscreens with Oxothiazolidine

We rate 67 sunscreens that contain it, showing the top 10 by overall score:

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